linux/net/devlink/port.c
Jiri Pirko ded6f77c05 devlink: extend multicast filtering by port index
Expose the previously introduced notification multicast messages
filtering infrastructure and allow the user to select messages using
port index.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2023-12-19 15:31:40 +01:00

1568 lines
44 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
*/
#include "devl_internal.h"
#define DEVLINK_PORT_FN_CAPS_VALID_MASK \
(_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1)
static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
[DEVLINK_PORT_FN_ATTR_STATE] =
NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE,
DEVLINK_PORT_FN_STATE_ACTIVE),
[DEVLINK_PORT_FN_ATTR_CAPS] =
NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK),
};
#define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \
WARN_ON_ONCE(!(devlink_port)->registered)
#define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \
WARN_ON_ONCE((devlink_port)->registered)
struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
unsigned int port_index)
{
return xa_load(&devlink->ports, port_index);
}
struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs)
{
if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index);
if (!devlink_port)
return ERR_PTR(-ENODEV);
return devlink_port;
}
return ERR_PTR(-EINVAL);
}
struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
return devlink_port_get_from_attrs(devlink, info->attrs);
}
static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps,
u32 cap, bool is_enable)
{
caps->selector |= cap;
if (is_enable)
caps->value |= cap;
}
static int devlink_port_fn_roce_fill(struct devlink_port *devlink_port,
struct nla_bitfield32 *caps,
struct netlink_ext_ack *extack)
{
bool is_enable;
int err;
if (!devlink_port->ops->port_fn_roce_get)
return 0;
err = devlink_port->ops->port_fn_roce_get(devlink_port, &is_enable,
extack);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable);
return 0;
}
static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port,
struct nla_bitfield32 *caps,
struct netlink_ext_ack *extack)
{
bool is_enable;
int err;
if (!devlink_port->ops->port_fn_migratable_get ||
devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
return 0;
err = devlink_port->ops->port_fn_migratable_get(devlink_port,
&is_enable, extack);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable);
return 0;
}
static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port,
struct nla_bitfield32 *caps,
struct netlink_ext_ack *extack)
{
bool is_enable;
int err;
if (!devlink_port->ops->port_fn_ipsec_crypto_get ||
devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
return 0;
err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable);
return 0;
}
static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port,
struct nla_bitfield32 *caps,
struct netlink_ext_ack *extack)
{
bool is_enable;
int err;
if (!devlink_port->ops->port_fn_ipsec_packet_get ||
devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
return 0;
err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable);
return 0;
}
static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
struct sk_buff *msg,
struct netlink_ext_ack *extack,
bool *msg_updated)
{
struct nla_bitfield32 caps = {};
int err;
err = devlink_port_fn_roce_fill(devlink_port, &caps, extack);
if (err)
return err;
err = devlink_port_fn_migratable_fill(devlink_port, &caps, extack);
if (err)
return err;
err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack);
if (err)
return err;
err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack);
if (err)
return err;
if (!caps.selector)
return 0;
err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value,
caps.selector);
if (err)
return err;
*msg_updated = true;
return 0;
}
int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port)
{
if (devlink_nl_put_handle(msg, devlink_port->devlink))
return -EMSGSIZE;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
return -EMSGSIZE;
return 0;
}
size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port)
{
struct devlink *devlink = devlink_port->devlink;
return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */
+ nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */
+ nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */
}
static int devlink_nl_port_attrs_put(struct sk_buff *msg,
struct devlink_port *devlink_port)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
if (!devlink_port->attrs_set)
return 0;
if (attrs->lanes) {
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
return -EMSGSIZE;
}
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable))
return -EMSGSIZE;
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
return -EMSGSIZE;
switch (devlink_port->attrs.flavour) {
case DEVLINK_PORT_FLAVOUR_PCI_PF:
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
attrs->pci_pf.controller) ||
nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf))
return -EMSGSIZE;
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PCI_VF:
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
attrs->pci_vf.controller) ||
nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) ||
nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf))
return -EMSGSIZE;
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PCI_SF:
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
attrs->pci_sf.controller) ||
nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
attrs->pci_sf.pf) ||
nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER,
attrs->pci_sf.sf))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
case DEVLINK_PORT_FLAVOUR_CPU:
case DEVLINK_PORT_FLAVOUR_DSA:
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
attrs->phys.port_number))
return -EMSGSIZE;
if (!attrs->split)
return 0;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
attrs->phys.port_number))
return -EMSGSIZE;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
attrs->phys.split_subport_number))
return -EMSGSIZE;
break;
default:
break;
}
return 0;
}
static int devlink_port_fn_hw_addr_fill(struct devlink_port *port,
struct sk_buff *msg,
struct netlink_ext_ack *extack,
bool *msg_updated)
{
u8 hw_addr[MAX_ADDR_LEN];
int hw_addr_len;
int err;
if (!port->ops->port_fn_hw_addr_get)
return 0;
err = port->ops->port_fn_hw_addr_get(port, hw_addr, &hw_addr_len,
extack);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
if (err)
return err;
*msg_updated = true;
return 0;
}
static bool
devlink_port_fn_state_valid(enum devlink_port_fn_state state)
{
return state == DEVLINK_PORT_FN_STATE_INACTIVE ||
state == DEVLINK_PORT_FN_STATE_ACTIVE;
}
static bool
devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate)
{
return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED ||
opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED;
}
static int devlink_port_fn_state_fill(struct devlink_port *port,
struct sk_buff *msg,
struct netlink_ext_ack *extack,
bool *msg_updated)
{
enum devlink_port_fn_opstate opstate;
enum devlink_port_fn_state state;
int err;
if (!port->ops->port_fn_state_get)
return 0;
err = port->ops->port_fn_state_get(port, &state, &opstate, extack);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
if (!devlink_port_fn_state_valid(state)) {
WARN_ON_ONCE(1);
NL_SET_ERR_MSG(extack, "Invalid state read from driver");
return -EINVAL;
}
if (!devlink_port_fn_opstate_valid(opstate)) {
WARN_ON_ONCE(1);
NL_SET_ERR_MSG(extack, "Invalid operational state read from driver");
return -EINVAL;
}
if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) ||
nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate))
return -EMSGSIZE;
*msg_updated = true;
return 0;
}
static int
devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable,
struct netlink_ext_ack *extack)
{
return devlink_port->ops->port_fn_migratable_set(devlink_port, enable,
extack);
}
static int
devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable,
struct netlink_ext_ack *extack)
{
return devlink_port->ops->port_fn_roce_set(devlink_port, enable,
extack);
}
static int
devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable,
struct netlink_ext_ack *extack)
{
return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack);
}
static int
devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable,
struct netlink_ext_ack *extack)
{
return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack);
}
static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
const struct nlattr *attr,
struct netlink_ext_ack *extack)
{
struct nla_bitfield32 caps;
u32 caps_value;
int err;
caps = nla_get_bitfield32(attr);
caps_value = caps.value & caps.selector;
if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) {
err = devlink_port_fn_roce_set(devlink_port,
caps_value & DEVLINK_PORT_FN_CAP_ROCE,
extack);
if (err)
return err;
}
if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
err = devlink_port_fn_mig_set(devlink_port, caps_value &
DEVLINK_PORT_FN_CAP_MIGRATABLE,
extack);
if (err)
return err;
}
if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value &
DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO,
extack);
if (err)
return err;
}
if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value &
DEVLINK_PORT_FN_CAP_IPSEC_PACKET,
extack);
if (err)
return err;
}
return 0;
}
static int
devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
struct netlink_ext_ack *extack)
{
struct nlattr *function_attr;
bool msg_updated = false;
int err;
function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION);
if (!function_attr)
return -EMSGSIZE;
err = devlink_port_fn_hw_addr_fill(port, msg, extack, &msg_updated);
if (err)
goto out;
err = devlink_port_fn_caps_fill(port, msg, extack, &msg_updated);
if (err)
goto out;
err = devlink_port_fn_state_fill(port, msg, extack, &msg_updated);
if (err)
goto out;
err = devlink_rel_devlink_handle_put(msg, port->devlink,
port->rel_index,
DEVLINK_PORT_FN_ATTR_DEVLINK,
&msg_updated);
out:
if (err || !msg_updated)
nla_nest_cancel(msg, function_attr);
else
nla_nest_end(msg, function_attr);
return err;
}
static int devlink_nl_port_fill(struct sk_buff *msg,
struct devlink_port *devlink_port,
enum devlink_command cmd, u32 portid, u32 seq,
int flags, struct netlink_ext_ack *extack)
{
struct devlink *devlink = devlink_port->devlink;
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
goto nla_put_failure;
spin_lock_bh(&devlink_port->type_lock);
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
goto nla_put_failure_type_locked;
if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
devlink_port->desired_type))
goto nla_put_failure_type_locked;
if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
if (devlink_port->type_eth.netdev &&
(nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
devlink_port->type_eth.ifindex) ||
nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
devlink_port->type_eth.ifname)))
goto nla_put_failure_type_locked;
}
if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
struct ib_device *ibdev = devlink_port->type_ib.ibdev;
if (ibdev &&
nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
ibdev->name))
goto nla_put_failure_type_locked;
}
spin_unlock_bh(&devlink_port->type_lock);
if (devlink_nl_port_attrs_put(msg, devlink_port))
goto nla_put_failure;
if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack))
goto nla_put_failure;
if (devlink_port->linecard &&
nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX,
devlink_linecard_index(devlink_port->linecard)))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure_type_locked:
spin_unlock_bh(&devlink_port->type_lock);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_port_notify(struct devlink_port *devlink_port,
enum devlink_command cmd)
{
struct devlink *devlink = devlink_port->devlink;
struct devlink_obj_desc desc;
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
if (!__devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL);
if (err) {
nlmsg_free(msg);
return;
}
devlink_nl_obj_desc_init(&desc, devlink);
devlink_nl_obj_desc_port_set(&desc, devlink_port);
devlink_nl_notify_send_desc(devlink, msg, &desc);
}
static void devlink_ports_notify(struct devlink *devlink,
enum devlink_command cmd)
{
struct devlink_port *devlink_port;
unsigned long port_index;
xa_for_each(&devlink->ports, port_index, devlink_port)
devlink_port_notify(devlink_port, cmd);
}
void devlink_ports_notify_register(struct devlink *devlink)
{
devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW);
}
void devlink_ports_notify_unregister(struct devlink *devlink)
{
devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL);
}
int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[1];
struct sk_buff *msg;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW,
info->snd_portid, info->snd_seq, 0,
info->extack);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int
devlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
struct netlink_callback *cb, int flags)
{
struct devlink_nl_dump_state *state = devlink_dump_state(cb);
struct devlink_port *devlink_port;
unsigned long port_index;
int err = 0;
xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) {
err = devlink_nl_port_fill(msg, devlink_port,
DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags,
cb->extack);
if (err) {
state->idx = port_index;
break;
}
}
return err;
}
int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one);
}
static int devlink_port_type_set(struct devlink_port *devlink_port,
enum devlink_port_type port_type)
{
int err;
if (!devlink_port->ops->port_type_set)
return -EOPNOTSUPP;
if (port_type == devlink_port->type)
return 0;
err = devlink_port->ops->port_type_set(devlink_port, port_type);
if (err)
return err;
devlink_port->desired_type = port_type;
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
return 0;
}
static int devlink_port_function_hw_addr_set(struct devlink_port *port,
const struct nlattr *attr,
struct netlink_ext_ack *extack)
{
const u8 *hw_addr;
int hw_addr_len;
hw_addr = nla_data(attr);
hw_addr_len = nla_len(attr);
if (hw_addr_len > MAX_ADDR_LEN) {
NL_SET_ERR_MSG(extack, "Port function hardware address too long");
return -EINVAL;
}
if (port->type == DEVLINK_PORT_TYPE_ETH) {
if (hw_addr_len != ETH_ALEN) {
NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device");
return -EINVAL;
}
if (!is_unicast_ether_addr(hw_addr)) {
NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported");
return -EINVAL;
}
}
return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len,
extack);
}
static int devlink_port_fn_state_set(struct devlink_port *port,
const struct nlattr *attr,
struct netlink_ext_ack *extack)
{
enum devlink_port_fn_state state;
state = nla_get_u8(attr);
return port->ops->port_fn_state_set(port, state, extack);
}
static int devlink_port_function_validate(struct devlink_port *devlink_port,
struct nlattr **tb,
struct netlink_ext_ack *extack)
{
const struct devlink_port_ops *ops = devlink_port->ops;
struct nlattr *attr;
if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] &&
!ops->port_fn_hw_addr_set) {
NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
"Port doesn't support function attributes");
return -EOPNOTSUPP;
}
if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) {
NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
"Function does not support state setting");
return -EOPNOTSUPP;
}
attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
if (attr) {
struct nla_bitfield32 caps;
caps = nla_get_bitfield32(attr);
if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE &&
!ops->port_fn_roce_set) {
NL_SET_ERR_MSG_ATTR(extack, attr,
"Port doesn't support RoCE function attribute");
return -EOPNOTSUPP;
}
if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) {
if (!ops->port_fn_migratable_set) {
NL_SET_ERR_MSG_ATTR(extack, attr,
"Port doesn't support migratable function attribute");
return -EOPNOTSUPP;
}
if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
NL_SET_ERR_MSG_ATTR(extack, attr,
"migratable function attribute supported for VFs only");
return -EOPNOTSUPP;
}
}
if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) {
if (!ops->port_fn_ipsec_crypto_set) {
NL_SET_ERR_MSG_ATTR(extack, attr,
"Port doesn't support ipsec_crypto function attribute");
return -EOPNOTSUPP;
}
if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
NL_SET_ERR_MSG_ATTR(extack, attr,
"ipsec_crypto function attribute supported for VFs only");
return -EOPNOTSUPP;
}
}
if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
if (!ops->port_fn_ipsec_packet_set) {
NL_SET_ERR_MSG_ATTR(extack, attr,
"Port doesn't support ipsec_packet function attribute");
return -EOPNOTSUPP;
}
if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
NL_SET_ERR_MSG_ATTR(extack, attr,
"ipsec_packet function attribute supported for VFs only");
return -EOPNOTSUPP;
}
}
}
return 0;
}
static int devlink_port_function_set(struct devlink_port *port,
const struct nlattr *attr,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
int err;
err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
devlink_function_nl_policy, extack);
if (err < 0) {
NL_SET_ERR_MSG(extack, "Fail to parse port function attributes");
return err;
}
err = devlink_port_function_validate(port, tb, extack);
if (err)
return err;
attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
if (attr) {
err = devlink_port_function_hw_addr_set(port, attr, extack);
if (err)
return err;
}
attr = tb[DEVLINK_PORT_FN_ATTR_CAPS];
if (attr) {
err = devlink_port_fn_caps_set(port, attr, extack);
if (err)
return err;
}
/* Keep this as the last function attribute set, so that when
* multiple port function attributes are set along with state,
* Those can be applied first before activating the state.
*/
attr = tb[DEVLINK_PORT_FN_ATTR_STATE];
if (attr)
err = devlink_port_fn_state_set(port, attr, extack);
if (!err)
devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
return err;
}
int devlink_nl_port_set_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[1];
int err;
if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
enum devlink_port_type port_type;
port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
err = devlink_port_type_set(devlink_port, port_type);
if (err)
return err;
}
if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
struct netlink_ext_ack *extack = info->extack;
err = devlink_port_function_set(devlink_port, attr, extack);
if (err)
return err;
}
return 0;
}
int devlink_nl_port_split_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[1];
struct devlink *devlink = info->user_ptr[0];
u32 count;
if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT))
return -EINVAL;
if (!devlink_port->ops->port_split)
return -EOPNOTSUPP;
count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
if (!devlink_port->attrs.splittable) {
/* Split ports cannot be split. */
if (devlink_port->attrs.split)
NL_SET_ERR_MSG(info->extack, "Port cannot be split further");
else
NL_SET_ERR_MSG(info->extack, "Port cannot be split");
return -EINVAL;
}
if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
NL_SET_ERR_MSG(info->extack, "Invalid split count");
return -EINVAL;
}
return devlink_port->ops->port_split(devlink, devlink_port, count,
info->extack);
}
int devlink_nl_port_unsplit_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[1];
struct devlink *devlink = info->user_ptr[0];
if (!devlink_port->ops->port_unsplit)
return -EOPNOTSUPP;
return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack);
}
int devlink_nl_port_new_doit(struct sk_buff *skb, struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink_port_new_attrs new_attrs = {};
struct devlink *devlink = info->user_ptr[0];
struct devlink_port *devlink_port;
struct sk_buff *msg;
int err;
if (!devlink->ops->port_new)
return -EOPNOTSUPP;
if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] ||
!info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) {
NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified");
return -EINVAL;
}
new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]);
new_attrs.pfnum =
nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]);
if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
/* Port index of the new port being created by driver. */
new_attrs.port_index =
nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
new_attrs.port_index_valid = true;
}
if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) {
new_attrs.controller =
nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]);
new_attrs.controller_valid = true;
}
if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF &&
info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) {
new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]);
new_attrs.sfnum_valid = true;
}
err = devlink->ops->port_new(devlink, &new_attrs,
extack, &devlink_port);
if (err)
return err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOMEM;
goto err_out_port_del;
}
err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW,
info->snd_portid, info->snd_seq, 0, NULL);
if (WARN_ON_ONCE(err))
goto err_out_msg_free;
err = genlmsg_reply(msg, info);
if (err)
goto err_out_port_del;
return 0;
err_out_msg_free:
nlmsg_free(msg);
err_out_port_del:
devlink_port->ops->port_del(devlink, devlink_port, NULL);
return err;
}
int devlink_nl_port_del_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[1];
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
if (!devlink_port->ops->port_del)
return -EOPNOTSUPP;
return devlink_port->ops->port_del(devlink, devlink_port, extack);
}
static void devlink_port_type_warn(struct work_struct *work)
{
struct devlink_port *port = container_of(to_delayed_work(work),
struct devlink_port,
type_warn_dw);
dev_warn(port->devlink->dev, "Type was not set for devlink port.");
}
static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
{
/* Ignore CPU and DSA flavours. */
return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA &&
devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;
}
#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
{
if (!devlink_port_type_should_warn(devlink_port))
return;
/* Schedule a work to WARN in case driver does not set port
* type within timeout.
*/
schedule_delayed_work(&devlink_port->type_warn_dw,
DEVLINK_PORT_TYPE_WARN_TIMEOUT);
}
static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
{
if (!devlink_port_type_should_warn(devlink_port))
return;
cancel_delayed_work_sync(&devlink_port->type_warn_dw);
}
/**
* devlink_port_init() - Init devlink port
*
* @devlink: devlink
* @devlink_port: devlink port
*
* Initialize essential stuff that is needed for functions
* that may be called before devlink port registration.
* Call to this function is optional and not needed
* in case the driver does not use such functions.
*/
void devlink_port_init(struct devlink *devlink,
struct devlink_port *devlink_port)
{
if (devlink_port->initialized)
return;
devlink_port->devlink = devlink;
INIT_LIST_HEAD(&devlink_port->region_list);
devlink_port->initialized = true;
}
EXPORT_SYMBOL_GPL(devlink_port_init);
/**
* devlink_port_fini() - Deinitialize devlink port
*
* @devlink_port: devlink port
*
* Deinitialize essential stuff that is in use for functions
* that may be called after devlink port unregistration.
* Call to this function is optional and not needed
* in case the driver does not use such functions.
*/
void devlink_port_fini(struct devlink_port *devlink_port)
{
WARN_ON(!list_empty(&devlink_port->region_list));
}
EXPORT_SYMBOL_GPL(devlink_port_fini);
static const struct devlink_port_ops devlink_port_dummy_ops = {};
/**
* devl_port_register_with_ops() - Register devlink port
*
* @devlink: devlink
* @devlink_port: devlink port
* @port_index: driver-specific numerical identifier of the port
* @ops: port ops
*
* Register devlink port with provided port index. User can use
* any indexing, even hw-related one. devlink_port structure
* is convenient to be embedded inside user driver private structure.
* Note that the caller should take care of zeroing the devlink_port
* structure.
*/
int devl_port_register_with_ops(struct devlink *devlink,
struct devlink_port *devlink_port,
unsigned int port_index,
const struct devlink_port_ops *ops)
{
int err;
devl_assert_locked(devlink);
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
devlink_port_init(devlink, devlink_port);
devlink_port->registered = true;
devlink_port->index = port_index;
devlink_port->ops = ops ? ops : &devlink_port_dummy_ops;
spin_lock_init(&devlink_port->type_lock);
INIT_LIST_HEAD(&devlink_port->reporter_list);
err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL);
if (err) {
devlink_port->registered = false;
return err;
}
INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
devlink_port_type_warn_schedule(devlink_port);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
return 0;
}
EXPORT_SYMBOL_GPL(devl_port_register_with_ops);
/**
* devlink_port_register_with_ops - Register devlink port
*
* @devlink: devlink
* @devlink_port: devlink port
* @port_index: driver-specific numerical identifier of the port
* @ops: port ops
*
* Register devlink port with provided port index. User can use
* any indexing, even hw-related one. devlink_port structure
* is convenient to be embedded inside user driver private structure.
* Note that the caller should take care of zeroing the devlink_port
* structure.
*
* Context: Takes and release devlink->lock <mutex>.
*/
int devlink_port_register_with_ops(struct devlink *devlink,
struct devlink_port *devlink_port,
unsigned int port_index,
const struct devlink_port_ops *ops)
{
int err;
devl_lock(devlink);
err = devl_port_register_with_ops(devlink, devlink_port,
port_index, ops);
devl_unlock(devlink);
return err;
}
EXPORT_SYMBOL_GPL(devlink_port_register_with_ops);
/**
* devl_port_unregister() - Unregister devlink port
*
* @devlink_port: devlink port
*/
void devl_port_unregister(struct devlink_port *devlink_port)
{
lockdep_assert_held(&devlink_port->devlink->lock);
WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET);
devlink_port_type_warn_cancel(devlink_port);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
xa_erase(&devlink_port->devlink->ports, devlink_port->index);
WARN_ON(!list_empty(&devlink_port->reporter_list));
devlink_port->registered = false;
}
EXPORT_SYMBOL_GPL(devl_port_unregister);
/**
* devlink_port_unregister - Unregister devlink port
*
* @devlink_port: devlink port
*
* Context: Takes and release devlink->lock <mutex>.
*/
void devlink_port_unregister(struct devlink_port *devlink_port)
{
struct devlink *devlink = devlink_port->devlink;
devl_lock(devlink);
devl_port_unregister(devlink_port);
devl_unlock(devlink);
}
EXPORT_SYMBOL_GPL(devlink_port_unregister);
static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port,
struct net_device *netdev)
{
const struct net_device_ops *ops = netdev->netdev_ops;
/* If driver registers devlink port, it should set devlink port
* attributes accordingly so the compat functions are called
* and the original ops are not used.
*/
if (ops->ndo_get_phys_port_name) {
/* Some drivers use the same set of ndos for netdevs
* that have devlink_port registered and also for
* those who don't. Make sure that ndo_get_phys_port_name
* returns -EOPNOTSUPP here in case it is defined.
* Warn if not.
*/
char name[IFNAMSIZ];
int err;
err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
WARN_ON(err != -EOPNOTSUPP);
}
if (ops->ndo_get_port_parent_id) {
/* Some drivers use the same set of ndos for netdevs
* that have devlink_port registered and also for
* those who don't. Make sure that ndo_get_port_parent_id
* returns -EOPNOTSUPP here in case it is defined.
* Warn if not.
*/
struct netdev_phys_item_id ppid;
int err;
err = ops->ndo_get_port_parent_id(netdev, &ppid);
WARN_ON(err != -EOPNOTSUPP);
}
}
static void __devlink_port_type_set(struct devlink_port *devlink_port,
enum devlink_port_type type,
void *type_dev)
{
struct net_device *netdev = type_dev;
ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
if (type == DEVLINK_PORT_TYPE_NOTSET) {
devlink_port_type_warn_schedule(devlink_port);
} else {
devlink_port_type_warn_cancel(devlink_port);
if (type == DEVLINK_PORT_TYPE_ETH && netdev)
devlink_port_type_netdev_checks(devlink_port, netdev);
}
spin_lock_bh(&devlink_port->type_lock);
devlink_port->type = type;
switch (type) {
case DEVLINK_PORT_TYPE_ETH:
devlink_port->type_eth.netdev = netdev;
if (netdev) {
ASSERT_RTNL();
devlink_port->type_eth.ifindex = netdev->ifindex;
BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) !=
sizeof(netdev->name));
strcpy(devlink_port->type_eth.ifname, netdev->name);
}
break;
case DEVLINK_PORT_TYPE_IB:
devlink_port->type_ib.ibdev = type_dev;
break;
default:
break;
}
spin_unlock_bh(&devlink_port->type_lock);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
}
/**
* devlink_port_type_eth_set - Set port type to Ethernet
*
* @devlink_port: devlink port
*
* If driver is calling this, most likely it is doing something wrong.
*/
void devlink_port_type_eth_set(struct devlink_port *devlink_port)
{
dev_warn(devlink_port->devlink->dev,
"devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n",
devlink_port->index);
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL);
}
EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
/**
* devlink_port_type_ib_set - Set port type to InfiniBand
*
* @devlink_port: devlink port
* @ibdev: related IB device
*/
void devlink_port_type_ib_set(struct devlink_port *devlink_port,
struct ib_device *ibdev)
{
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
}
EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
/**
* devlink_port_type_clear - Clear port type
*
* @devlink_port: devlink port
*
* If driver is calling this for clearing Ethernet type, most likely
* it is doing something wrong.
*/
void devlink_port_type_clear(struct devlink_port *devlink_port)
{
if (devlink_port->type == DEVLINK_PORT_TYPE_ETH)
dev_warn(devlink_port->devlink->dev,
"devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n",
devlink_port->index);
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
}
EXPORT_SYMBOL_GPL(devlink_port_type_clear);
int devlink_port_netdevice_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
struct devlink_port *devlink_port = netdev->devlink_port;
struct devlink *devlink;
if (!devlink_port)
return NOTIFY_OK;
devlink = devlink_port->devlink;
switch (event) {
case NETDEV_POST_INIT:
/* Set the type but not netdev pointer. It is going to be set
* later on by NETDEV_REGISTER event. Happens once during
* netdevice register
*/
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH,
NULL);
break;
case NETDEV_REGISTER:
case NETDEV_CHANGENAME:
if (devlink_net(devlink) != dev_net(netdev))
return NOTIFY_OK;
/* Set the netdev on top of previously set type. Note this
* event happens also during net namespace change so here
* we take into account netdev pointer appearing in this
* namespace.
*/
__devlink_port_type_set(devlink_port, devlink_port->type,
netdev);
break;
case NETDEV_UNREGISTER:
if (devlink_net(devlink) != dev_net(netdev))
return NOTIFY_OK;
/* Clear netdev pointer, but not the type. This event happens
* also during net namespace change so we need to clear
* pointer to netdev that is going to another net namespace.
*/
__devlink_port_type_set(devlink_port, devlink_port->type,
NULL);
break;
case NETDEV_PRE_UNINIT:
/* Clear the type and the netdev pointer. Happens one during
* netdevice unregister.
*/
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET,
NULL);
break;
}
return NOTIFY_OK;
}
static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
enum devlink_port_flavour flavour)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
devlink_port->attrs_set = true;
attrs->flavour = flavour;
if (attrs->switch_id.id_len) {
devlink_port->switch_port = true;
if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN))
attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN;
} else {
devlink_port->switch_port = false;
}
return 0;
}
/**
* devlink_port_attrs_set - Set port attributes
*
* @devlink_port: devlink port
* @attrs: devlink port attrs
*/
void devlink_port_attrs_set(struct devlink_port *devlink_port,
struct devlink_port_attrs *attrs)
{
int ret;
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
devlink_port->attrs = *attrs;
ret = __devlink_port_attrs_set(devlink_port, attrs->flavour);
if (ret)
return;
WARN_ON(attrs->splittable && attrs->split);
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
/**
* devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
*
* @devlink_port: devlink port
* @controller: associated controller number for the devlink port instance
* @pf: associated PF for the devlink port instance
* @external: indicates if the port is for an external controller
*/
void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller,
u16 pf, bool external)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
ret = __devlink_port_attrs_set(devlink_port,
DEVLINK_PORT_FLAVOUR_PCI_PF);
if (ret)
return;
attrs->pci_pf.controller = controller;
attrs->pci_pf.pf = pf;
attrs->pci_pf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
/**
* devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
*
* @devlink_port: devlink port
* @controller: associated controller number for the devlink port instance
* @pf: associated PF for the devlink port instance
* @vf: associated VF of a PF for the devlink port instance
* @external: indicates if the port is for an external controller
*/
void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
u16 pf, u16 vf, bool external)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
ret = __devlink_port_attrs_set(devlink_port,
DEVLINK_PORT_FLAVOUR_PCI_VF);
if (ret)
return;
attrs->pci_vf.controller = controller;
attrs->pci_vf.pf = pf;
attrs->pci_vf.vf = vf;
attrs->pci_vf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
/**
* devlink_port_attrs_pci_sf_set - Set PCI SF port attributes
*
* @devlink_port: devlink port
* @controller: associated controller number for the devlink port instance
* @pf: associated PF for the devlink port instance
* @sf: associated SF of a PF for the devlink port instance
* @external: indicates if the port is for an external controller
*/
void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller,
u16 pf, u32 sf, bool external)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
ret = __devlink_port_attrs_set(devlink_port,
DEVLINK_PORT_FLAVOUR_PCI_SF);
if (ret)
return;
attrs->pci_sf.controller = controller;
attrs->pci_sf.pf = pf;
attrs->pci_sf.sf = sf;
attrs->pci_sf.external = external;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);
static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index)
{
struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index);
if (!devlink_port)
return;
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
}
static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index,
u32 rel_index)
{
struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index);
if (devlink_port && devlink_port->rel_index == rel_index)
devlink_port->rel_index = 0;
}
/**
* devl_port_fn_devlink_set - Attach peer devlink
* instance to port function.
* @devlink_port: devlink port
* @fn_devlink: devlink instance to attach
*/
int devl_port_fn_devlink_set(struct devlink_port *devlink_port,
struct devlink *fn_devlink)
{
ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF ||
devlink_port->attrs.pci_sf.external))
return -EINVAL;
return devlink_rel_nested_in_add(&devlink_port->rel_index,
devlink_port->devlink->index,
devlink_port->index,
devlink_port_rel_notify_cb,
devlink_port_rel_cleanup_cb,
fn_devlink);
}
EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set);
/**
* devlink_port_linecard_set - Link port with a linecard
*
* @devlink_port: devlink port
* @linecard: devlink linecard
*/
void devlink_port_linecard_set(struct devlink_port *devlink_port,
struct devlink_linecard *linecard)
{
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
devlink_port->linecard = linecard;
}
EXPORT_SYMBOL_GPL(devlink_port_linecard_set);
static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
char *name, size_t len)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int n = 0;
if (!devlink_port->attrs_set)
return -EOPNOTSUPP;
switch (attrs->flavour) {
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
if (devlink_port->linecard)
n = snprintf(name, len, "l%u",
devlink_linecard_index(devlink_port->linecard));
if (n < len)
n += snprintf(name + n, len - n, "p%u",
attrs->phys.port_number);
if (n < len && attrs->split)
n += snprintf(name + n, len - n, "s%u",
attrs->phys.split_subport_number);
break;
case DEVLINK_PORT_FLAVOUR_CPU:
case DEVLINK_PORT_FLAVOUR_DSA:
case DEVLINK_PORT_FLAVOUR_UNUSED:
/* As CPU and DSA ports do not have a netdevice associated
* case should not ever happen.
*/
WARN_ON(1);
return -EINVAL;
case DEVLINK_PORT_FLAVOUR_PCI_PF:
if (attrs->pci_pf.external) {
n = snprintf(name, len, "c%u", attrs->pci_pf.controller);
if (n >= len)
return -EINVAL;
len -= n;
name += n;
}
n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
break;
case DEVLINK_PORT_FLAVOUR_PCI_VF:
if (attrs->pci_vf.external) {
n = snprintf(name, len, "c%u", attrs->pci_vf.controller);
if (n >= len)
return -EINVAL;
len -= n;
name += n;
}
n = snprintf(name, len, "pf%uvf%u",
attrs->pci_vf.pf, attrs->pci_vf.vf);
break;
case DEVLINK_PORT_FLAVOUR_PCI_SF:
if (attrs->pci_sf.external) {
n = snprintf(name, len, "c%u", attrs->pci_sf.controller);
if (n >= len)
return -EINVAL;
len -= n;
name += n;
}
n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf,
attrs->pci_sf.sf);
break;
case DEVLINK_PORT_FLAVOUR_VIRTUAL:
return -EOPNOTSUPP;
}
if (n >= len)
return -EINVAL;
return 0;
}
int devlink_compat_phys_port_name_get(struct net_device *dev,
char *name, size_t len)
{
struct devlink_port *devlink_port;
/* RTNL mutex is held here which ensures that devlink_port
* instance cannot disappear in the middle. No need to take
* any devlink lock as only permanent values are accessed.
*/
ASSERT_RTNL();
devlink_port = dev->devlink_port;
if (!devlink_port)
return -EOPNOTSUPP;
return __devlink_port_phys_port_name_get(devlink_port, name, len);
}
int devlink_compat_switch_id_get(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct devlink_port *devlink_port;
/* Caller must hold RTNL mutex or reference to dev, which ensures that
* devlink_port instance cannot disappear in the middle. No need to take
* any devlink lock as only permanent values are accessed.
*/
devlink_port = dev->devlink_port;
if (!devlink_port || !devlink_port->switch_port)
return -EOPNOTSUPP;
memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
return 0;
}